Cotesia melanoscela

Cotesia melanoscela from White Satin Moth (Leucoma salicis) in Queen's Gardens, Hull, VC61.

Dolichogenidea breviventris

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Dolichogenidea breviventris (Ratzeburg) (= Apantales mesoxanthus (Ruschka)) is a known parasitoid of Coleophora serratella and I found three examples in July and August 2012 emerging from serratella cases found on birch in Baildon and Esholt, West Yorkshire, VC64.
The middle photograph shows the female.

Cotesia pilicornis

This male Cotesia pilicornis emerged from its cocoon on 3rd September 2012. It had parasitised a larva of the Beautiful Plume moth, Amblyptilia acanthadactyla, found on Hedge Woundwort near Otley, West Yorkshire, VC64.